Patents by Inventor Naoki Ichikawa

Naoki Ichikawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240099889
    Abstract: The control unit executes an irradiation plan acquisition step and a spot interval guide display step. At the irradiation plan acquisition step, the control unit acquires an irradiation plan for irradiating a patient's eye with treatment laser light using a contact lens having a reflective surface that reflects the treatment laser light in a direction intersecting the optical axis. At the spot interval guide display step, the control unit controls the internal display unit to display a spot interval guide indicative of an appropriate interval between a plurality of irradiation spots in accordance with the progress of the irradiation plan. The plurality of irradiation spots are scheduled to be irradiated with the laser light.
    Type: Application
    Filed: September 26, 2023
    Publication date: March 28, 2024
    Inventors: Takanori TSUMURA, Naoki ICHIKAWA, Kohei MASUNAGA, Shota MIZUTA, Teruki TSUKAMOTO
  • Patent number: 9452428
    Abstract: A microfluidic device allowing for multiple discrete reactions sites and allowing for sequential reactions and sample analysis along with methods for device fabrication and use is provided. The microfluidic device provides a micro-total analysis system on a single substrate and has multiple reaction sites allowing for cascade reactions and analysis on a single chip using micro-quantities of sample and reagents. The microfluidic device provides discrete sites for immobilization of cognitive agents including enzymes, binding proteins, nucleic acids and the like as well as methods for quantitative analysis. The invention also provides methods for the fabrication of the device.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: September 27, 2016
    Assignee: National Science and Technology Development Agency
    Inventors: Mana Sriyudthsak, Apinan Soottitantawat, Yongyuth Wanna, Sakon Rahong, Vichuta Lauruengtana, Naoki Ichikawa, Sohei Matsumoto, Ryutaro Maeda
  • Publication number: 20150064688
    Abstract: A microfluidic device allowing for multiple discrete reactions sites and allowing for sequential reactions and sample analysis along with methods for device fabrication and use is provided. The microfluidic device provides a micro-total analysis system on a single substrate and has multiple reaction sites allowing for cascade reactions and analysis on a single chip using micro-quantities of sample and reagents. The microfluidic device provides discrete sites for immobilization of cognitive agents including enzymes, binding proteins, nucleic acids and the like as well as methods for quantitative analysis. The invention also provides methods for the fabrication of the device.
    Type: Application
    Filed: November 6, 2014
    Publication date: March 5, 2015
    Inventors: Mana Sriyudthsak, Apinan Soottitantawat, Yongyuth Wanna, Sakon Rahong, Vichuta Lauruengtana, Naoki Ichikawa, Sohei Matsumoto, Ryutaro Maeda
  • Patent number: 8955971
    Abstract: A fundus photographing apparatus comprises: an anterior-segment observation optical system arranged to image an anterior-segment illuminated with infrared light to obtain an anterior-segment image; a fundus photographing optical system arranged to image a fundus illuminated with visible light emitted from a light source to obtain a fundus image; a display controller arranged to selectively display the fundus image and the anterior-segment image on a monitor; a photographing switch for inputting a photographing start signal to start photographing using the fundus photographing optical system; and a time informing part arranged to inform an elapsed time after the photographing start signal is input with the photographing switch or an elapsed time after the visible light is emitted from the light source, wherein the display controller displays the elapsed time informed by the time informing part together with the anterior-segment image on the monitor.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: February 17, 2015
    Assignee: Nidek Co., Ltd.
    Inventors: Naoki Ichikawa, Yoshiaki Mimura
  • Publication number: 20120224141
    Abstract: A fundus photographing apparatus comprises: an anterior-segment observation optical system arranged to image an anterior-segment illuminated with infrared light to obtain an anterior-segment image; a fundus photographing optical system arranged to image a fundus illuminated with visible light emitted from a light source to obtain a fundus image; a display controller arranged to selectively display the fundus image and the anterior-segment image on a monitor; a photographing switch for inputting a photographing start signal to start photographing using the fundus photographing optical system; and a time informing part arranged to inform an elapsed time after the photographing start signal is input with the photographing switch or an elapsed time after the visible light is emitted from the light source, wherein the display controller displays the elapsed time informed by the time informing part together with the anterior-segment image on the monitor.
    Type: Application
    Filed: February 28, 2012
    Publication date: September 6, 2012
    Applicant: NIDEK CO., LTD.
    Inventors: Naoki ICHIKAWA, Yoshiaki MIMURA
  • Patent number: 7878653
    Abstract: A fundus camera capable of favorably photographing a fundus of an examinee's eye comprises a fundus photographing optical system comprising a visible light source which emits illumination light onto the fundus, a focusing lens movable in an optical axis direction thereof, and a fundus image pickup element, an optical system comprising a first photodetector, for detecting a focus state of the photographing optical system with respect to the fundus, a blink sensor which comprises a second photodetector and detects a blink of the eye based on a photo-receiving signal from the second photodetector, and a control unit arranged to suspend photographing upon input of a predetermined signal until the blink is detected by the sensor, and control the light source to emit the light when a predetermined period of time has passed since the blink is detected by the sensor in order to execute the photographing.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: February 1, 2011
    Assignee: Nidek Co., Ltd.
    Inventors: Naoki Ichikawa, Makihiro Ishikawa
  • Patent number: 7837329
    Abstract: A fundus camera favorably performing focusing on a fundus of an examinee's eye without a black dot plate in a target projection optical system comprises an illumination optical system comprising a light source and an objective lens, a photographing optical system comprising a focusing lens movable in the optical axis direction and a diopter correction lens to correct a diopter of severe ametropia, a first moving mechanism comprising a first driving unit moving the focusing lens, a focus detection optical system comprising a projection optical system comprising a light source and a photo-receiving optical system comprising a photodetector, a second moving mechanism comprising a second driving unit moving a part of the detection optical system including at least one of the projection light source and the photodetector in the optical axis direction, a monitor, and a control unit controlling the second unit in conjunction with movement of the focusing lens.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: November 23, 2010
    Assignee: Nidek Co., Ltd.
    Inventors: Masayuki Yoshino, Yoshiaki Mimura, Akira Tawada, Naoki Ichikawa
  • Patent number: 7651223
    Abstract: A fundus camera capable of preferably photographing the periphery of a fundus irrespective of the state of an eye includes a photographing optical system having a photographing optical axis for photographing the fundus, a fundus observation optical system for picking up a fundus observation image, an alignment target projection optical system for projecting an alignment target onto an anterior segment of the eye, an alignment target image detection optical system, a photographing unit housing the systems, a moving mechanism moving the unit for alignment of the axis, a fixation target presenting system for guiding a visual line direction, a target presenting position being selectable or changeable, a display unit, and a controller controlling the display unit to display the observation and target images, wherein the controller includes a program for forming and displaying a reticle mark in displaying the observation image varying the shape of the mark with the presenting position.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: January 26, 2010
    Assignee: Nidek Co., Ltd.
    Inventor: Naoki Ichikawa
  • Patent number: 7641340
    Abstract: A fundus camera of which the operability in alignment when photographing a fundus is enhanced includes a photographing optical system having a photographing optical axis which photographs the fundus, a fundus observation optical system picking up a fundus observation image, an anterior-segment observation optical system picking up an anterior-segment observation image, a photographing unit housing the optical systems, a moving mechanism moving the unit for alignment of the axis, a display unit, and a controller controlling the display unit and making display switching between the images on a screen of the display unit, wherein the controller includes a program for forming and displaying a reticle mark both in displaying the fundus observation image and in displaying the anterior-segment observation image while forming and displaying an alignment mark of which a relative distance from the reticle mark varies with an alignment deviation amount of the axis with respect to an eye.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: January 5, 2010
    Assignee: Nidek Co., Ltd.
    Inventor: Naoki Ichikawa
  • Publication number: 20090244483
    Abstract: A fundus camera favorably performing focusing on a fundus of an examinee's eye without a black dot plate in a target projection optical system comprises an illumination optical system comprising a light source and an objective lens, a photographing optical system comprising a focusing lens movable in the optical axis direction and a diopter correction lens to correct a diopter of severe ametropia, a first moving mechanism comprising a first driving unit moving the focusing lens, a focus detection optical system comprising a projection optical system comprising a light source and a photo-receiving optical system comprising a photodetector, a second moving mechanism comprising a second driving unit moving a part of the detection optical system including at least one of the projection light source and the photodetector in the optical axis direction, a monitor, and a control unit controlling the second unit in conjunction with movement of the focusing lens.
    Type: Application
    Filed: March 31, 2009
    Publication date: October 1, 2009
    Applicant: NIDEK CO., LTD.
    Inventors: Masayuki YOSHINO, Yoshiaki MIMURA, Akira TAWADA, Naoki ICHIKAWA
  • Publication number: 20090180073
    Abstract: A fundus camera capable of favorably photographing a fundus of an examinee's eye comprises a fundus photographing optical system comprising a visible light source which emits illumination light onto the fundus, a focusing lens movable in an optical axis direction thereof, and a fundus image pickup element, an optical system comprising a first photodetector, for detecting a focus state of the photographing optical system with respect to the fundus, a blink sensor which comprises a second photodetector and detects a blink of the eye based on a photo-receiving signal from the second photodetector, and a control unit arranged to suspend photographing upon input of a predetermined signal until the blink is detected by the sensor, and control the light source to emit the light when a predetermined period of time has passed since the blink is detected by the sensor in order to execute the photographing.
    Type: Application
    Filed: November 7, 2008
    Publication date: July 16, 2009
    Applicant: NIDEK CO., LTD.
    Inventors: Naoki Ichikawa, Makihiro Ishikawa
  • Publication number: 20090004746
    Abstract: A microfluidic device allowing for multiple discrete reactions sites and allowing for sequential reactions and sample analysis along with methods for device fabrication and use is provided. The microfluidic device provides a micro-total analysis system on a single substrate and has multiple reaction sites allowing for cascade reactions and analysis on a single chip using micro-quantities of sample and reagents. The microfluidic device provides discrete sites for immobilization of cognitive agents including enzymes, binding proteins, nucleic acids and the like as well as methods for quantitative analysis. The invention also provides methods for the fabrication of the device.
    Type: Application
    Filed: June 2, 2008
    Publication date: January 1, 2009
    Inventors: Mana SRIYUDTHSAK, Apinan SOOTTITANTAWAT, Yongyuth WANNA, Sakon RAHONG, Vichuta LAURUENGTANA, Naoki ICHIKAWA, Sohei MATSUMOTO, Ryutaro MAEDA
  • Patent number: 7445336
    Abstract: A fundus camera, in which operability is improved while not impairing the convenience of the function of automatic alignment, has a photographing part including a fundus photographing optical system, a moving unit which moves the photographing part, an observation optical system having a first image-pickup element which picks up a fundus image, an observation optical system having a second image-pickup element which picks up an anterior-segment image, a display unit capable of displaying the images, a control part which obtains information on alignment of the photographing part with the eye and controls driving of the moving unit based on the alignment information so that an alignment state satisfies a first reference condition, and a first input switch for inputting a signal for display switching from the fundus image to the anterior-segment image, wherein the control part prohibits the driving of the moving unit when the signal is inputted.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: November 4, 2008
    Assignee: Nidek Co., Ltd.
    Inventor: Naoki Ichikawa
  • Publication number: 20080212029
    Abstract: A fundus camera capable of preferably photographing the periphery of a fundus irrespective of the state of an eye includes a photographing optical system having a photographing optical axis for photographing the fundus, a fundus observation optical system for picking up a fundus observation image, an alignment target projection optical system for projecting an alignment target onto an anterior segment of the eye, an alignment target image detection optical system, a photographing unit housing the systems, a moving mechanism moving the unit for alignment of the axis, a fixation target presenting system for guiding a visual line direction, a target presenting position being selectable or changeable, a display unit, and a controller controlling the display unit to display the observation and target images, wherein the controller includes a program for forming and displaying a reticle mark in displaying the observation image varying the shape of the mark with the presenting position.
    Type: Application
    Filed: February 29, 2008
    Publication date: September 4, 2008
    Applicant: NIDEK CO., LTD.
    Inventor: Naoki Ichikawa
  • Publication number: 20080212028
    Abstract: A fundus camera of which the operability in alignment when photographing a fundus is enhanced includes a photographing optical system having a photographing optical axis which photographs the fundus, a fundus observation optical system picking up a fundus observation image, an anterior-segment observation optical system picking up an anterior-segment observation image, a photographing unit housing the optical systems, a moving mechanism moving the unit for alignment of the axis, a display unit, and a controller controlling the display unit and making display switching between the images on a screen of the display unit, wherein the controller includes a program for forming and displaying a reticle mark both in displaying the fundus observation image and in displaying the anterior-segment observation image while forming and displaying an alignment mark of which a relative distance from the reticle mark varies with an alignment deviation amount of the axis with respect to an eye.
    Type: Application
    Filed: February 28, 2008
    Publication date: September 4, 2008
    Applicant: NIDEK CO., LTD.
    Inventor: Naoki Ichikawa
  • Patent number: 7331670
    Abstract: A fundus camera that performs alignment easily and efficiently, and photographing a fundus favorably. A fundus camera has a photographing part in which a fundus photographing optical system is arranged, a fundus observation optical system having a first image-pickup element which picks up an image of the fundus, an anterior-segment observation optical system having a second image-pickup element which picks up an image of an anterior-segment of the eye, a display unit capable of displaying the image of the fundus picked up by the first image-pickup element and the image of the anterior-segment picked up by the second image-pickup element, and a control part which obtains information on alignment of the photographing part with the eye and decides which of the image of the fundus and the image of the anterior-segment is to be displayed on the display unit.
    Type: Grant
    Filed: November 26, 2004
    Date of Patent: February 19, 2008
    Assignee: Nidek Co., Ltd
    Inventor: Naoki Ichikawa
  • Patent number: 7219996
    Abstract: A fundus camera capable of performing accurate and easy focusing in photographing a peripheral portion of a fundus has a photographing optical system including a photographing optical axis, a focusing lens movable in a direction of the photographing optical axis and an image-pickup element, a lens moving unit, a focus target projection optical system, a focus target detection optical system, a fixation target presenting unit, in which a presenting position of the fixation target is changeable between a reference position for photographing a central portion of the fundus and a position for photographing a peripheral portion, a device which controls the lens moving unit to perform automatic focusing, and a device which controls the fixation target presenting unit to bring the presenting position of the fixation target to the reference position when the automatic focusing is actuated, even though the presenting position is set to the peripheral position.
    Type: Grant
    Filed: September 22, 2004
    Date of Patent: May 22, 2007
    Assignee: Nidek Co., Ltd.
    Inventor: Naoki Ichikawa
  • Publication number: 20070013867
    Abstract: A fundus camera, in which operability is improved while not impairing the convenience of the function of automatic alignment, has a photographing part including a fundus photographing optical system, a moving unit which moves the photographing part, an observation optical system having a first image-pickup element which picks up a fundus image, an observation optical system having a second image-pickup element which picks up an anterior-segment image, a display unit capable of displaying the images, a control part which obtains information on alignment of the photographing part with the eye and controls driving of the moving unit based on the alignment information so that an alignment state satisfies a first reference condition, and a first input switch for inputting a signal for display switching from the fundus image to the anterior-segment image, wherein the control part prohibits the driving of the moving unit when the signal is inputted.
    Type: Application
    Filed: October 21, 2005
    Publication date: January 18, 2007
    Applicant: Nidek Co., Ltd.
    Inventor: Naoki Ichikawa
  • Publication number: 20050117115
    Abstract: A fundus camera capable of performing alignment easily and efficiently, and photographing a fundus favorably. A fundus camera for photographing a fundus of an eye of an examinee has a photographing part in which a fundus photographing optical system is arranged, a fundus observation optical system having a first image-pickup element which picks up an image of the fundus, an anterior-segment observation optical system having a second image-pickup element which picks up an image of an anterior-segment of the eye, a display unit capable of displaying the image of the fundus picked up by the first image-pickup element and the image of the anterior-segment picked up by the second image-pickup element, and a control part which obtains information on alignment of the photographing part with the eye and decides which of the image of the fundus and the image of the anterior-segment is to be displayed on the display unit.
    Type: Application
    Filed: November 26, 2004
    Publication date: June 2, 2005
    Applicant: Nidek Co., Ltd.
    Inventor: Naoki Ichikawa
  • Publication number: 20050068496
    Abstract: A fundus camera capable of performing accurate and easy focusing in photographing a peripheral portion of a fundus has a photographing optical system including a photographing optical axis, a focusing lens movable in a direction of the photographing optical axis and an image-pickup element, a lens moving unit, a focus target projection optical system, a focus target detection optical system, a fixation target presenting unit, in which a presenting position of the fixation target is changeable between a reference position for photographing a central portion of the fundus and a position for photographing a peripheral portion, a device which controls the lens moving unit to perform automatic focusing, and a device which controls the fixation target presenting unit to bring the presenting position of the fixation target to the reference position when the automatic focusing is actuated, even though the presenting position is set to the peripheral position.
    Type: Application
    Filed: September 22, 2004
    Publication date: March 31, 2005
    Applicant: NIDEK CO., LTD.
    Inventor: Naoki Ichikawa